Description
This is an uncommon Ludwigia, not long known in the aquarium hobby. Ludwigia sphaerocarpa, the Roundfruit Primrose Willow, is one of the many Ludwigia species native to the wetlands of southwestern North America. This species is actually long known to science, however only some years ago hobbyists in the USA discovered its qualities as aquarium plant. The emersed plant has a rather inconspicuous look, with its shrubby growth and narrow, green leaves. The more spectacular is its submerged habit: the underwater shoots are very compact, almost rosette-like, and good lighting provided, the leaves develop striking orange-brown tones.
Ludwigia sphaerocarpa benefits much from strong lighting, CO2 supply and a nutrient-rich substrate. It grows relatively slowly; the thick stems grow almost creeping to ascending. Occasional pruning enhances ramification, and the cuttings can be used for propagation.
The unique appearance of this rare Ludwigia is showcased best in the foreground to midground of not too small aquariums. A group of few, well developed shoots forms a distinctive colour and shape accent and contrasts well with low, green, small-leaved plants.
